21411152 has 40 divisors (see below), whose sum is σ = 48318336. Its totient is φ = 9000576.

The previous prime is 21411149. The next prime is 21411161. The reversal of 21411152 is 25111412.

It is a self number, because there is not a number n which added to its sum of digits gives 21411152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4133 + ... + 7739.

Almost surely, 2^21411152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21411152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24159168).

21411152 is an abundant number, since it is smaller than the sum of its proper divisors (26907184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21411152 is a wasteful number, since it uses less digits than its factorization.

21411152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675 (or 3669 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 21411152 is about 4627.2186030055. The cubic root of 21411152 is about 277.6813283401.

Adding to 21411152 its reverse (25111412), we get a palindrome (46522564).

The spelling of 21411152 in words is "twenty-one million, four hundred eleven thousand, one hundred fifty-two".